If you've found unmatched transactions by filtering the Finance > Card transactions > Transactions menu by the Status labeled Missing expense, you can identify the card holder by looking at the name of the card (visible in the left-most column, Company card). In most cases, companies name the cards in their system according to the card holder.
You can also identify the card holders using the Finance > Analytics menu, by selecting Transactions under the Choose type dropdown list and by dragging the data fields Transaction-ID and Company card – Name to the Rows field.
💡 Tip
If there is a non-identifying card name, you can turn to your Admin user to identify the card holder for you. The Admin user can find the name of the card holder by reviewing the card name in the Admin > Company cards tab, where they can then filter the cards by searching for the card name in the Filter field.